Karen Sykes disappeared in Mt. Rainier National Park
                                
                                
                                    (Newser) -
                                    An outdoors writer nicknamed the "guru of trails" died of hypothermia after  disappearing on a hike in Mount Rainier National Park  last week, authorities have confirmed, ruling the death an accident. Karen Sykes, 70, had written more than 100 stories about hikes in the area and associates say that...